From: Ingmar Stieger <redmine@...>
Date: 2011-01-26T02:50:35+09:00
Subject: [ruby-core:34852] [Ruby 1.9-Bug#3840] Ruby 1.9.2p0 crashes using Rails 3.0 on repeated browser refresh

Issue #3840 has been updated by Ingmar Stieger.


I have exactly the same problem as Sean, and the call to rb_io_check_closed(fptr) does not help. In my case, the crash happens on 2-3 page reloads, so almost instantly.

What does help is this crude fix:

--- a/transcode.c	2010-06-17 09:55:46 +0000
+++ b/transcode.c	2011-01-25 17:08:01 +0000
@@ -1446,6 +1446,12 @@
     unsigned char empty_buf;
     unsigned char *empty_ptr = &empty_buf;
 
+    if (!ec)
+    {
+      rb_raise(rb_eUndefinedConversionError, "ec is null (ing)");
+      return(econv_undefined_conversion);
+    }
+
     ec->started = 1;
 
     if (!input_ptr) {

This results in the following console message:

[2011-01-25 18:13:17] ERROR Encoding::UndefinedConversionError: ec is null (ing)
        c:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.1/lib/rails/rack/log_tailer.rb:23:in `read'
        c:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.1/lib/rails/rack/log_tailer.rb:23:in `tail!'
        c:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.1/lib/rails/rack/log_tailer.rb:15:in `call'
        c:/Ruby192/lib/ruby/gems/1.9.1/gems/rack-1.2.1/lib/rack/content_length.rb:13:in `call'
        c:/Ruby192/lib/ruby/gems/1.9.1/gems/rack-1.2.1/lib/rack/handler/webrick.rb:52:in `service'
        c:/Ruby192/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service'
        c:/Ruby192/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run'
        c:/Ruby192/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'

At least it does not crash any more, though I am not sure what the side effects of this might be.

Any ideas for a real solution ?

Ingmar


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http://redmine.ruby-lang.org/issues/show/3840

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